Folder shutter slat and folder shutter made thereby



Feb. 19, 1952 age 2,586,561

FOLDER SHUTTER SLAT AND FOLDER SHUTTER MADE THEREBY Filed 001?- 27, 1948 2 SHEETS-SHEET 1 /)r/ M i P P s W JI I l P P a; azug jfim leae FOLDER SHUTTER SLAT AND FOLDER SHUTTER MADE THEREBY Filed Oct. 27, 1948 G- POGGI Feb. 19, 1952 2 SHEETSSHEET 2 Patented Feb. 19, 1952 :E-OLDER, SHUTTER. SLAT AND FOLDER SHUTTER MADETHEREBY Giovanni Poggi, Bologna, "Italy Application. October 27, 1948,'="-Se1'.ia;l:No. 256,823

I r In Italy-A ril 2,3;v 19.48

7 2 'Cl'aims. (Cl, 160-233) 1 "The present invention relates to..a metal1ic.s1'at adapted' for th construction. ofxfolding shutters tohelused as solid or lattice gate, door, railings anddiaphragms.

1 Morepartieularly, this invention r'elatessto .a

metallic. slat ,having'. two spiral rolls bent towards the same side of the slat, and particularly adapted for,the construction. of,.heavy folding shutters. andyhaving'jthe peculiarity that the spiral. rolls on botht sides of. theslat are. exactly. alike, but rolled spirally in opposite directionsjthe center of the spiral lying on. the extension. of plane of the'fiat part.

1 Such types ofshutters. ar notoriouslm adapted enclosin largeapertures, or. also for such apertulpesinwhichit is not p ssible to. fit rolling shuttersdue. to Jackof. space. above thewapertureto be closed.

The, principal object of the. invention is to providelan. improved "slat. which simplifies the construction,v of. such .,shutters,i by eliminating any intermediate connecting member between t. the various elements .of the .shut er. which. are directl hinged together.

1 Another object of-rtheinvention is ;tomanufacture aheavy folding. shutter; whose straight .parts are exactlyaligned, by hinging together av numbenbf saidv slatsswherebyeach. slat-is. .hinged. .to two adjacent like slats, turned. in. oppositedirections, by sliding either of its curls into either of the curls of the adjoining slat.

Still another object of the invention is to manufacture a folding: shutter: .made 111 ;of slats such as .those. above referred to, which is providedwith means for co-acting with'fixedguide meansand which the two spiral rolls tendto comein parallel relation, viz, with beginning and end of the spirals close together, a; shutter .made up. of slats, as above indicated, must .be collected in zigzag formation into. an appropriate casing. or space.

. vItfisto be noted. that, in .this zspecificationsthe term fshutters. shall. includes-not. only. shutters proper made of solidnslats hingedtogether, but also lattice shutters.- .or gates, composed. ofqslotted or votherwiseapertured slats. or lattice-like rectangulan .memhers provided at their ,long edges with spiral rolls bent towards thesameside of the slat-like members.

. Furtherobiects and advantagesnf the. present inventiontwill beapparent from-the following de scription, referencegbeing had-to the .accompanw promoting an easy folding and unfolding of the shutter in -horiz0nta1-direction; whereby in the folded. shutter the slats arecollected behindbne sidewallsubstantially vertically with respect: to them/all.

.Ifhe various objects are attained, according'ito the invention, by shaping sheet :metal hands 'alike slats of the known rolling shutters constituted by directly hinged slatswith'thedifference that the two spiral rolls instead of being. bent towardsyop posite sidesof the slats, as iniusual rollingshuting.drawings-.-.in which: V

Figure. 1 representsby ,way :Qf? example across sectionthrougha completeslathinged tothe ends of two slats, one of which has a ribbed b.0dy.

:Figure 2v is aplan. view of.-a;folder shutter-obtainedby .thehingingof slats otthe kind. shown points with-:therlowen, guide for promoting .the

folding.

. Eige-lodsea section on: line-X Xi of. Fig. :1 hand showsthe coroperationrzof-theyupperrmmsaMith ppenguide member, ifior promoting.thefolding; and; Fig; 11 is: asection: :on-line iXI-"XI:oI

Figgltl.

1.J In.-F-igl1res lzpandi 2, the. shutters comprises a mun-hereof: .likeslatszot sheetzmetal, constituted byr aasnbstantially fiatzportion A: and A Y or ribbed portion A or: rectangular: shape, whose edges terminate with two spiral rolls B, B, which can be. considered as mirror images the one of the other and which usually extend through a little more than 360, whereby the center of the spiral rolls lies approximately on the extension of the fiat part of each slat.

As it is apparent from the drawing, each spiral roll B, which seen in one direction is wound or bent in clockwise direction is hinged to the spiral roll B in the same direction of an adjacent slat. but which appears as bent in reverse direction, due to the fact that the front side of the slats A or A" corresponds to the back sides of the slats A.

When a shutter composed of a number of slats shown in Fig. 1 hinged together as said shutter is folded in any suitable manner, the spiral rolls. hinged together will tend to roll in a direction in which they come to be approximately parallel to one another, as clearly shown in Figure 2 and therefore the rolls B on one side of the slats will result as bent in anticlockwise direction while those B on the opposite side will be seen as bent in clockwise direction.

As it is apparent to the skilled in such shutter types, the manner in which such slats are collected depends upon the arrangement of suitable slatguiding and shifting means, when the shutter" suspended carry shifting members or cams C (see also Figs. 7 and 10) integral with plates W and which by co-acting with an abutment N (Fig. 10) provided under the guides V, near one side of the aperture to be closed. On the lower shutter side, a deep guide channel S is provided in which can slide bothlong bolts P, provided under the camearrying hinges and short bolts P provided under the suspended hinges, this guide ends with an inclined deflecting surface K and, beyond this inclined surface, is continued by a shallow guide channel G, in which only the short bolts P can penetrate. Bolts P and P are carried by plates W bolted to slats A.

From the foregoing it is apparent that the fold ing of the shutter, when same is shifted towards the collecting side provided with deflecting members N and K, is promoted by being deflected at the upper end by co-action of cams C with abut ments N and at the lower end by co-action oflong bolts P with the deflecting surface K at the end of deep guide S and at the beginning of shallow guide G.

The slats of the folded shutter are all collected behind one side wall of the door opening and lie substantially at right angles to this wall, thus leaving the door opening completely free.

From the preceding specification it is also apparent that whenever spiral rolls like B and B are provided to the edges of rectangular member, even when these are not simple sheet metal slats, but on the contrary frame-like or latticeor grid-like member, folding shutters may be obtained which are of lattice, slotted or trellis type, and so on, which all shall be included in the term slat.

Thus it is apparent that the invention may be embodied in a number of different ways, all based on the above outlined principle. Thus also bolts P and P could be provided with rollers. Therefore, it shall be understood that the term "bolts shall include also bolts provided with rollers or the like.

I claim:

1. A folding shutter made up of a number of metallic slats provided with spiral curls at both edges and hinged together by interengagement of said spiral curls, a number of rolling suspension means corresponding with alternate hinge points, horizontal guide means for said suspension extending beyond the aperture to be closed by the shutter, on one side thereof, cams attached to the upper end of each slat, above the hinges that are not provided with suspension means, an abutment under said roller guides, fitted in a position by one side of the aperture to be shut, and abutting against said cams to turn same and deflect the attached slat, a deep guide channel on the floor of the aperture to be shut, an inclined surface at the end of said deep guide channel and a shallow channel as an extension of said deep channel, behind one of the side walls of said aperture, long bolts attached to the slats and projecting into the deep channel corresponding with the hinges provided with cams and short bolts attached to the hinges suspended to said rollers, the long bolts being of such a length as not to penetrate into the shallow channel, but to slide upon the inclined surface at the end of the deep channel, while the short bolts can slide also within said shallow channel.

2. In a folding shutter made up of a number of metallic slats, means on said slats for directly hinging the same together, each slat comprising a substantially flat part provided at its edges with uniformly formed spiral curls extending through an angle of about 360, the centers of said curls lying approximately on the extension of the flat part of the slat, the curls on opposite edges of each slat being wound in opposite directions, whereby the hinging of the slats is efiected by sliding the curls of one slat into the curls of another slat, rolling suspension means corresponding with alternate hinge points, horizontal guide means for said suspension extending beyond the aperture to be closed by the shutter on one side thereof and shifting means in correspondence with those of the alternate hinge points which are not provided with suspension means.

GIOVANNI POGGI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 790,632 Hall May 23, 1905 1,205,707 Cahill Nov. 21, 1916 1,351,844 Fairhurst Sept. 7, 1920 1,964,316 Ellison June 26, 1934 FOREIGN PATENTS Number Country Date 663,205 France Mar. 30, 1929 

